Ada/Ed

An interpreter, editor, and run-time
environment for Ada, intended as a teaching tool. Ada/Ed
does not have the capacity, performance, or robustness of
commercial Ada compilers. Ada/Ed was developed at New York
University as part of a project in language definition and
software prototyping.

It handles nearly all of Ada 83 and was last validated with
version 1.7 of the ACVC tests. Being an interpreter, it
does not implement most representation clauses and thus does
not support systems programming close to the machine level.